<template >
    <div>
       <!--面包屑导航区域-->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
        </el-breadcrumb>
        <!--卡片视图-->
        <el-card>
            <!--提示区域-->
            <el-alert
            title="消息提示的文案"
            type="info"
            center
            show-icon>
            </el-alert>
            <!--步骤条区域-->
            <el-steps  :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <!--tab栏区域-->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" class="demo-ruleForm" label-position='top'>
            <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforTabLeave" @tab-click="tabClicked">
                <el-tab-pane label="基本信息" name="0">
                    <el-form-item label="商品名称" prop="goods_name">
                        <el-input v-model="addForm.goods_name"></el-input>
                    </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price">
                        <el-input v-model="addForm.goods_price" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品重量" prop="goods_weight">
                        <el-input v-model="addForm.goods_weight" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_number">
                        <el-input v-model="addForm.goods_number" type="number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品分类" prop="goods_cat">
                        <el-cascader
                        expand-trigger="hover"
                        :options="catelist"
                        :props="cateProps"
                        v-model="addForm.goods_cat"
                        @change="handleChange">
                        </el-cascader>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品参数" name="1">
                    <!--渲染表单的Item项-->
                    <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                        <!--复选框组-->
                            <el-checkbox-group v-model="item.attr_vals" >
                            <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                            </el-checkbox-group>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品属性" name="2">
                    <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                        <el-input v-model="item.attr_vals"></el-input>
                    </el-form-item>
                </el-tab-pane>
                <el-tab-pane label="商品图片" name="3">
                <!-- action 表示图片上传到后台的API地址 -->
                    <el-upload
                    :action="uploadURL"
                    :on-preview="handlePreview"
                    :on-remove="handleRemove"
                    list-type="picture"
                    :headers="headerObj"
                    :on-success="handleSuccess">
                    <el-button size="small" type="primary">点击上传</el-button>
                    </el-upload>
                </el-tab-pane>
                <el-tab-pane label="商品内容" name="4">
                    <!-- 富文本编辑器组件 -->
                    <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                    <!-- 添加商品的按钮 -->
                    <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                </el-tab-pane>
            </el-tabs>
            </el-form>
        </el-card>

        <!-- 图片预览 -->
        <el-dialog
        title="图片预览"
        :visible.sync="previewVisible"
        width="50%">
        <img :src="previewPath" alt="" class="previewImg">
        </el-dialog>
    </div>
</template>
<script>
import _ from 'lodash'
    export default{
        data(){
            return {
                activeIndex:'0',
                // 添加商品的表单数据对象
                addForm:{
                    goods_name:'',
                    goods_price:0,
                    goods_weight:0,
                    goods_number:0,
                    // 商品所属的分类数组
                    goods_cat:[],
                    pics:[],
                    // 商品的详情描述
                    goods_introduce:'',
                    attrs:[]
                },
                addFormRules:{
                    goods_name:[
                        {required: true, message:'请输入商品名称', trigger: 'blur'}
                    ],
                    goods_price:[
                        {required: true, message:'请输入商品价格', trigger: 'blur'}
                    ],
                    goods_weight:[
                        {required: true, message:'请输入商品重量', trigger: 'blur'}
                    ],
                    goods_number:[
                        {required: true, message:'请输入商品数量', trigger: 'blur'}
                    ],
                    goods_cat:[
                        {required: true, message:'请输入商品分类', trigger: 'blur'}
                    ]
                },
                // 商品分类列表
                catelist:[],
                cateProps:{
                    label:'cat_name',
                    value:'cat_id',
                    children:'children'
                },
                // 动态参数列表数据
                manyTableData:[],
                // 静态属性列表数据
                onlyTableData:[],
                uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
                headerObj:{
                    Authorization:window.sessionStorage.getItem('token')
                },
                previewPath:'',
                previewVisible:false
                
            }
        },
        created(){
            this.getCateList()
        },
        methods:{
            async getCateList(){
                const {data:res}=await this.$http.get(`categories`)
                if(res.meta.status!==200){
                    return this.$message.error('获取商品分类数据失败！')
                }
                this.catelist=res.data
                console.log(this.catelist);
            },
            // 级联选择器选中项变换，会触发这个函数
            handleChange(){
                // console.log(this.addForm.goods_cat);
                if(this.addForm.goods_cat.length!==3){
                    this.addForm.goods_cat=[]
                }
            },
            beforTabLeave(activeName,oldActiveName){
                if(oldActiveName==='0' && this.addForm.goods_cat.length!==3){
                    this.$message.error('请选择商品分类')
                    return false
                }
            },
            async tabClicked(){
                if(this.activeIndex==='1'){
                    const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{
                    params:{sel:'many'}
                    })
                    if(res.meta.status!==200){
                        return this.$message.error('获取动态数据失败！')
                    }
                    // console.log(res.data);
                    res.data.forEach(item=>{
                        item.attr_vals= item.attr_vals.length===0 ? []:item.attr_vals.split(',')
                    })
                    this.manyTableData=res.data
                }else if(this.activeIndex==='2'){
                    const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{
                        params:{sel:'only'}
                    })
                    if(res.meta.status!==200){
                        return this.$message.error('获取静态数据失败！')
                    }
                    this.onlyTableData=res.data
                }
                
            },
            // 处理图片预览效果
            handlePreview(file){
                this.previewPath=file.response.data.url
                this.previewVisible=true
            },
            // 处理移除图片的操作
            handleRemove(file){
                // 1.获取将要删除的图片的临时路径
                const filePath=file.response.data.tmp_path
                // 2.从 pics 数组中，找到这个图片对应的索引值
                const i=this.addForm.pics.findIndex(x=>x.pics===filePath)
                // 3.调用数组中的splice 方法，把图片信息对象，从pics 数组中移除
                this.addForm.pics.splice(i,1)
                console.log(this.addForm);
            },
            // 监听图片上传成功的事件
            handleSuccess(response){
                // 1.拼接得到一个图片信息对象
                const picInfo={pic:response.data.tmp_path}
                // 2.将图片信息对象，push到pics数组中
                this.addForm.pics.push(picInfo)
                console.log(this.addForm);
            },
            add(){
                this.$refs.addFormRef.validate(async valid=>{
                    if(!valid){
                        return this.$message.error('请填写必要的表单项！')
                    }
                    // 执行添加的业务逻辑
                    // lodash cloneDeep(obj)
                    const form=_.cloneDeep(this.addForm)
                    form.goods_cat=form.goods_cat.join(',')
                    // console.log(form);
                    // 处理动态参数
                    this.manyTableData.forEach(item=>{
                        const newInfo={
                            attr_id:item.attr_id,
                            attr_value:item.attr_vals.join(',')
                        }
                        this.addForm.attrs.push(newInfo)
                    })
                    // 处理静态属性
                    this.onlyTableData.forEach(item=>{
                        const newInfo={
                            attr_id:item.attr_id,
                            attr_value:item.attr_vals
                        }
                        this.addForm.attrs.push(newInfo)
                    })
                    form.attrs=this.addForm.attrs
                    // console.log(form);
                    const {data:res}=await this.$http.post('goods',form)
                    console.log(res);
                    if(res.meta.status!==201){
                        return this.$message.error('添加商品失败！')
                    }
                    this.$message.success('添加商品成功！')
                    this.$router.push('/goods')
                })
            }
        },
        computed:{
            cateId(){
                if(this.addForm.goods_cat.length===3){
                    return this.addForm.goods_cat[2]
                }
                return null
            }
        }
    }
</script>
<style lang="less" scoped>
.el-checkbox {
    margin: 0 10px 0 0 !important;
}
.previewImg{
    width: 100%;
}
.btnAdd {
margin-top: 15px;
}
</style>